I have learned from the reading of The Urantia Book that there were 2 previous rebellions before Lucifer's. Since there has been a total of 3 rebellions will God allow for a fourth or more?

You asked: I have learned from the reading of The Urantia Book that
there were 2 previous rebellions before Lucifer's. Since there have
been a total of 3 rebellions will God allow for a fourth or more?

Thanks for this most interesting question. I found two passages that
address this issue:

45:2.1 The chief executive of
a local system of inhabited worlds is a primary Lanonandek Son, the
System Sovereign. In our local universe these sovereigns are intrusted
with large executive responsibilities, unusual personal prerogatives.
Not all universes, even in Orvonton, are so organized as to permit the
System Sovereigns to exercise such unusually wide powers of personal
discretion in the direction of system affairs. But in all the history
of Nebadon these untrammeled executives have exhibited disloyalty only
three times. The Lucifer rebellion in the system of Satania was the
last and the most widespread of all.

And this one addresses the problems associated with the fact of
distance from God as a factor in rebellion:

50:1.3 Being quite alone as
representatives of divinity on the individual planets, these Sons are
tested severely, and Nebadon has suffered the misfortune of several
rebellions. In the creation of the System Sovereigns and the Planetary
Princes there occurs the personalization of a concept that has been
getting farther and farther away from the Universal Father and the
Eternal Son, and there is an increasing danger of losing the sense of
proportion as to one's self-importance and a greater likelihood of
failure to keep a proper grasp of the values and relationships of the
numerous orders of divine beings and their gradations of authority.
That the Father is not personally present in the local universe also
imposes a certain test of faith and loyalty on all these Sons.

Freewill choice is given by God to all of the personalities in all
of the evolutionary universes. That being true, there will always be
the potential for evil because God does not interfere with free will
choice. In Caligastia's case, he freely chose to join Lucifer's
rebellion; the consequences of that rebellion involved the quarantine
of our entire system from the celestial circuits and we see its
repercussions still working themselves out in our world.

But since we now enjoy the ministry of Christ Michael himself as our
Planetary Prince and system Sovereign, it is probably not possible that
there will ever be another rebellion here, in my opinion.

These events are pretty rare in any event; it could be that in ages
to come there may be potential for other rebellions with other new
systems and other planetary visitations, but it seems to me that we
will not have to go through another one. I think that we can rest easy,
knowing that Christ Michael of Nebadon is now at the helm.

134:8.9 On an afternoon in late summer,
amid the trees and in the silence of nature, Michael of Nebadon won the
unquestioned sovereignty of his universe. On that day he completed the
task set for Creator Sons to live to the full the incarnated life in
the likeness of mortal flesh on the evolutionary worlds of time and
space. The universe announcement of this momentous achievement was not
made until the day of his baptism, months afterward, but it all really
took place that day on the mountain. And when Jesus came down from his
sojourn on Mount Hermon, the Lucifer rebellion in Satania and the
Caligastia secession on Urantia were virtually settled. Jesus had paid
the last price required of him to attain the sovereignty of his
universe, which in itself regulates the status of all rebels and
determines that all such future upheavals (if they ever occur) may be
dealt with summarily and effectively